Door lock for elevators.



R. F. LE BROCQ.

DOOR LOCK FOR ELEVATORS. APPLICATION FILEDJUNE 28. 1916. RENEWEDMAR.15.1911.

Patented May 1, 1917.

2 SHEETS-SHEET I I" 13 Illll], IL I i f 5 6 3 wvewtoz item H243 R. Fa LEBROCQ.

DOOR LOCK FOR ELEVATORS.

APPLICATION FILED was 28.. me. RENEWED MAR. 16.1917.

1,2Q4J82, Patented May 1, 1917.

2 SHEETSSHEET 2. 3' 35 34 52 93 31 za A w alum-m,

$331 a 61mm "Uri l l ED PATENT @FFEGE.

RICHARF F. LE BROCQ, OF NEW YORK, N. Y., ASSIGNOR TO LE BROCQ COMPANY,OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

EDGE-LOCK FOR ELEVATURS.

Continuation of application Serial No. 53,092, filed September 28, 1915.

Specification of 'Letters Patent.

Serial No. 106,323. Renewed March 16, 1917. Serial No. 155,373.

To aZZ whom it may concern:

Be it known that l, RICHARD F. LE BRooQ, a citizen of the United States,and a resident of the city of New York, county of Kings, and State ofNew York, have invented a new and useful Improvement in Door-Locks forElevators, of which the following is a full clear, and exactdescription.

My invention relates to improvements in elevator door locks, and moreespecially to that class of locks in which the controller circuit of theelevator car is only closed and operative when the several doors of anelevator well are locked. The general object of my invention is toproduce a simple locking mechanism which provides for the wtmostsai'ety, and yet which enables the Operator to control the elevatorto the extent of moving it to a floor in case the elevator is stalledbetween -floors.

My invention is intended to produce an electrically controlled lockingsystem in which the controller circuit is closed and opened by theclosing and opening of the door, and more particularly by the operationor the door look, so that the controller circuit will broken in case thelock of any door is unsecured. Still more particularly my inventionrelates to the more common.

form of elevator doors in which a burdock is used, that is a verticallysliding bar on the door which engages a catch, and the controllercircuit is opened and closed by the movement of this slide bar ofbar-lock. Another feature of my invention is to pro vide for eachelevator door a snap switch which is operated by the door lock, andwhich quickly makes and brealrs the circuit so that there is p acticallyno danger of injury to the sun ch, and consequent disruption ol' thecircuit.

This application is a con' prior application l lo. 53,0952, 1 2c, 1915.

My invention is also intended provide an extremely simple and absolutelyreliable apparatus by means of which the elevators can be operated withthe utmost safety.

Reference is to be had to the accompanying drawings forming o' thisspecification, in si iilar ce characters indicate corresponding paws allthe Figure 1 is a broken inside elevation of the bar lock and snapswitch connected therewith one wall of the switch casing being removedand the switch being shown in neutral position.

Fig. 2 is an edge view of the construction shown in Fig. 1.

Fig. 3 is a view generally similar to Fig. 1, but showing the switchsnapped into a position to close the circuit, and

Fig. is a diagrammatic View of the controller circuits including thebaby switch and emergency switch.

The elevator door 10 can be of any usual construction, and l have shownthe ordinary sliding door having thereon the customary verticallyarranged slide bar ll which is preferably enlarged at the top to form ahead ll, and which slides in guide brackets 12 and 13 on the door. Theslide bar 11 is provided with a handle 14 by which the operator can movethe door backward and forward, and move the bar vertically. The slidebar 11 is normally raised by the spring 15 arranged between the bracket12 and the head ll The general arrangement of the slide bar shown issimilar to that in common use.

The top of the bar 11 is inclined as shown at 16, so that it will engagetheinclinedsun face 17 of the catch 18 which is secured in the elevatorwell adjacent to the upper ed e of the door, and when the door is closedthe inclined parts 16 and 1? will {rictionally engage, the slide bar 11is pushed downward, and when the bar has passed the catch 18, the spring15 forces the bar upward behind the catch 18, thus locking the door.

The vertical movement of the slide bar lit in locking or unlocking thedoor operates a snap switch 19 to close the circuit through thecontroller 4.4.- of the car, which circuit will he referred to morespecifically herein afier. do not limit the invention to the particularform of snap switch or to the particular connection between the switchand the slide bar ll, though I have shown a preferred construction inwhich the head 11 of the slide her is recessed near the top and on-theinner side as shown at 29, so as to slide into engagement with a lug 21on the slide bolt 22 which moves vertical in the switch casin beingsecur 'he ust more doc.

lull

10, and the slide bolt has a limited movement by means of the slot 24therein and the limiting screw 25 which extends through the slot andinto the casing 23. .The slide bolt 22 is recessed as shown at 26 toreceive the head 27 of the generally horizontal switch arm 28 of thesnap switch, which switch arm as a whole is of a generally T shape, andis pivoted at the bottom as shown at 29. A

stem 30 rises from the arm 28, the stem being widened at the top andterminating in lugs 31 at the upper extremity, which lugs are spacedapart so as to permit the striking pin 32 to lie normally between them.This striking pin 32 projects from a tumbler 33 which is pivoted to thecasing just behind the stem 30 of the main switch arm as shown at 34.,and at the upper end the tumbler has a contact 35 which is insulated asshown at 36 from the body of the tumbler. This contact 35 is adapted toclose a circuit between the spring arms 37 which are provided withbinding posts 38, and are spaced apart as shown in Fig. 2, being securedto a bracket 40 and separated therefrom by means of insulation as shownat 39. Near one extremity of the arm 28 is a pin 41 which is secured toa retractile spring 42 which lies generally parallel with the arm 28 andis secured at one end as shown at 43 to the casing 23.

The operation of the switch is as follows: When the slide bar 11 andbolt 22 are raised in the action of locking the elevator door, the mainswitch arm 28-34 is tilted on the pivot 29, thus bringing the pull ofthe spring l2 out of alinement with the points.-fi1-29- 43, and belowthe pivot pin 29. This causes the main switch arm to give a quick jumpso that one of the lugs 31 striking the pin 32 of the tumbler 33, snapsthe contact 35 quickly beneath the contacts 37 and closes the circuit.\Vhen the door is imlocked the reverse operation takes" place. The arm2834 is actuated in the opposite direction and the second lug 31 strikesthe pin 32 and jerks the tumbler in the opposite direction, thus openingthe circuit.

I have not shown the controlling mechanism except in diagram becausethis is precisely as usual and may be of any preferred type. Thecontroller 4.4 is carried on the car in the customary manner, and thecar is also provided with a baby switch 46 and an emergency switch 45.

The circuits are as follows: The source of supply comes in at the pointA through any approved connection inthe main elevator circuits. Normallyit will follow the wire a through the baby switch 4:6, thence throughthe wire 5, the several. switches 19 at the several doors, thecontroller, back to the source of supply. The wire 6 is also connectedto a wire 0 which connects through the switch 45 to the baby switch 46.If the switch 45 is opened the current flows as already outlined. If,however, there is an accident to the circuit in the door mechanism andit is necessary to operate the elevator to bring it to a floor, theswitch 45 is closed and the current then flows through the wire a, theswitch 46, the switch 45, the wire 0 and the wire ,6 back through thecontroller to the source of supply, thus cutting out the door mechanism.

I wish it distinctly understood that while I have shown a type of switchand connections which I prefer and which are thoroughly practical, stillI do not limit the in vention'to the connections shown or the particularform of switch illustrated.

Especial attention is called, however, to the arrangement of the snapswitch which can be used in connection with any typeof spring bolt. Thishas the advantage over any arrangement ofwire or knife switchesordinarily used, because with such switches the door is apt to reboundwhen closed, and contact causes these switches to are and burn out;whereas with my type of switch and connections the door is locked beforethe switch snaps, thereby avoiding any possibility of opening the switchby the rebound of the door. The same advantage applies on opening thedoor, as the switch snaps and breaks contact before the door isunlocked.

I claim:

1. A system of the kind described comprising an elevator door, a slidebar thereon forming a part of the door lock, an electric circuit, a carcontroller in said circuit, a switch for making and breaking thecircuit, means for operating the switch by the movement of the slide barof the lock, and a connection between the slide bar and the switchoperating by the opening and closing of the door.

2. A system of the kind described comprising an elevator door, a lockingslide bar thereon, a switch having a slide .bolt automatically engagingin and disengaging from the slide bar by the opening and closing of thedoor, an electric circuit including said switch, a car controller insaid circuit, and means for operating the switch by the longitudinalmovement of the slide bar.

3. In a system of the kind described, the combination with the electricswitch and the slide bolt depending therefrom, of the elevator door, thelocking slide bar thereon, and a separable connection between the slidebar and its bolt, said connection being made and broken by the openingand closing of the door.

4. In a. system of the kind described, the combination of the elevatordoor and the slide bar thereon forming a part of the lock, said slidebar having a recem therein, of an electric switch adjacent to the door,a slide bolt for operating the switch, and a lug on the slide boltengaging the recess of the slide bar of the lock.

5. In a system of the kind described, the

combination with the elevator door and the slide bar thereon forming apart of the lock, of a slide bolt on the switch having aseparableconnection with the aforesaid slide bar and a snap switch operated bythe movement of the slide bolt.

6. In a system of the kind described, the combination with the elevatordoor and the locking slide bar thereon, of a switch adjacent to thedoor, a slide bolt in the switch having a separable connection with theaforesaid slide bar, a tilting switch arm connected with the slide bolt,a spring connection between one end of the switch arm and a support nearthe slide bolt whereby the tilting of the switch arm past a given pointcauses the spring to snap the said arm, a pivoted tumbler having closingmeans thereon, and lugs on the switch arm spaced apart and adapted toengage the pin of the tumbler.

7. In a system of the kind described the combination with the elevatordoor and the locking slide bar thereon, of an electric switch, a slidebolt separably connected with the aforesaid slide bar, a tilting switcharm connected with the slide bolt, a spring connected with the switcharm and a support and adapted to move the switch arm suddenly when thelatter is past a given point, a tumbler pivoted near the switch arm,means on the switch arm to engage and tilt the tumbler, and circuitclosing means on the tumbler.

8. A system of the kind described comprising an elevator door, avertically movable slide'bar thereon forming a part'of the door lock, anelectric circuit, a car controller in said circuit, a catch above theslide bar to engage the latter and over which the slide bar passes inclosing the door, a switch for making and breaking the circuit, saidswitch being arranged behind the catch soas to be engaged by the slidebar after the latter passes the catch, and means for operating theswitch in both. directions by the movement of the bar lock of the door.

9. A system of the kind described comprising an elevator door, avertically moving slide bar thereon forming a part of the door lock, anelectric circuit, a car controller in said circuit, a catch above theslide bar to engage the latter and over which the slide bar passes inclosing the door, a switch for making and breaking the circuit, saidswitch being arranged behind the cap so as to be.

operated by the slide bar after the latter passes the catch, and meansfor opening and closing the switch by the longitudinal movement ofthe'bar lock of the door.

RICHARD F. LE BROCQ.

Witnesses:

W. J. MCCLURE, E. W. HAVILAND.

